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FIZIKA B 13 (2004) 1, 315-320
 
FLAVOR SEPARATED QUARK POLARIZATIONS AT HERMES
WOLFGANG LORENZON
on behalf of the HERMES collaboration
Randall Laboratory of Physics, University of Michigan, Ann Arbor, MI
48109-1120, USA
Received 4 September 2003; Accepted 26 April 2004
Online 22 October 2004
Recent HERMES results are presented on the flavor decomposition of the sea quark
helicity distributions in the nucleon from semi-inclusive deep inelastic scattering. For
the first time, a five component decomposition of quark helicity distributions using
flavor tagging has been performed. The helicity distributions of the up and down
quarks confirm the results obtained from inclusive deep inelastic scattering, however,
there is no evidence for either a negative strange quark polarization or for a flavor
asymmetry in the light sea polarization.
PACS numbers: 13.60.-r, 13.88.+e, 14.20.Dh, 14.65.-q
UDC 539.12
Keywords: polarized lepton-nucleon interactions, polarized quark and anti-quark
distributions
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